Paint.



u; U06 HUIUI UIIUB \JUBYII UOIIIUWO, MIIIIIICI'! COATING B PLAST lo i uuUNITED STATES PATENT OFFICE.

srnomcanon' forming m of Letter Patent no. 668,769, dated December 11,1900,

Amman ma August 10, m7. Burial at. 641,745. on specimens.) I?

To all whom it may concern.-

Be it known that I, Manx W. Mnnsmm, a citizen of the United States,residing atthe city of Philadelphia, in the county of Philadelphia andState of Pennsylvania, have invented certain new and useful Im rovementsin Compositions of Matter for so as Paint and the Like, of which thefollowing is a specifioatiou.

xo The object of my invention is to provide a comparatively inexpensive,reliable, and durable paint adapted for use on oil-cloth and otherfabrics and on iron, steel, and metal objects and for other purposes andwhich posx 5 sesses an, attractive rough-cast appearance and presents asoft and smooth feeling to the touch and which shall be a non-conductor,and therefore proof against dampness due to condensation.-

:0 In practicing my invention I make use of ground ve%ble pith, such-asdried cornpith, an m is vegetable pith ll! granu ar condition with asuitable vehicle, as oil, and suitable coloring -'matter or pigments.

:5 The pith may be ground in oil, and the coloring-matter or pigment maybe added, or the pith, coloring matter, and oil may be all groundtogether. In some cases .in order to obtain a comparatively roughappearance the ground or powdered pith may be stirred into ordinarypaint. The paint may be made fireproof by adding sal-ammoniac orsilicate of soda or equivalent material. The proportion in which thepith is used may be varied ac- 5 cordingas it is desired to have themixture more or less .fluid, and by adding the pith in comparativelylarge quantities the mixture may be caused to assume the consistency ofa plastic. However, I may state the follow-- 40 ing proportions, which Ihave found to produce an excellent white paint: twenty-five ounces oflinseed-oil,-three ounces of powdered 'th Wands of S anish whitin threepounds of white lead an t ree ounces 5 ofJa an orother drier. Howeventheseproportions maybe increased, diminished, or varied accordingto the consistency required by the user. Two quarts of silicate of sodaand f ammoniac may be added to forty gallons of med paint, and after thesame has been thoroughly mixed oil may be added to thinthe mixture. Inthis way the paint is made fireproof, as has been already stated.

Thepaint of my invention when applied to a surface imparts to it arough-cast appearance immediately. This rough surface pre- 'sents thatappearance commonly designated rough cast; but-it difiers from theroughcast surface in that it is quite soft to the touch, whereas manyrough cast surfaces are so rough to the touch that they actually abradethe skin if brought in contact with them. It is known that vegetablepith is absorbent and is anon-conductor, so that such pith whenincorporated with paint as described and applied to metallic surfiacesserves to prevent condensation'due to changes of temperature and thelike. This quality adapts paint of my invention for use on iron shipsand the like, where at the present time much diiiiculty is encounteredby reason of the deleterious effects of the condensation 01: moisture.The fact that vegetable pith is a poor conductor of heat and cold causesit when incorporated with paint as described to render the latter-alsoimpervious to the passage of heat and cold. I

-It will be obvious to those skilled in the art to which my inventionappertains that modifications may be made in details without departingfrom the spirit thereof. Hence I do not limit myself tothe preciseproportions hereinabove set forth; but,

. Having thus described the nature and objects of my invention, what Iclaim as new, and desire to secure by Letters Patent, is-- Thewithin-described rough-cast paint consisting of a suitable vehiclecombined with dried vegetable pith in a granular condition,substantially as described.

In testimony whereof I atfix my signature in presence of two witnesses.

MARK w. MARSDEN.

I Witnesses:

A. B. Srouenron',

two gallons of water and one pound of sal- V. W. Mmnnnron.

